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1、PDISO/PAS18940-1:2025ImagingmaterialsImagepermanencespecificationofreflectionphotographicPrintSforindoorapplicationsPart1:Testmethodsbsi.NationalforewordThisPublishedDocumentistheUKimplementationofISO/PAS18940-1:2025.ItsupersedesPDISO/PAS18940-1:2023,whichiswithdrawn.TheUKparticipationinitspreparati
2、onwasentrustedtoTechnicalCommitteeCPW42,Photography.Alistoforganizationsrepresentedonthiscommitteecanbeobtainedonrequesttoitscommitteemanager.ContractualandlegalconsiderationsThispublicationhasbeenpreparedingoodfaith,howevernorepresentation,warranty,assuranceorundertaking(expressorimplied)isorwillbe
3、made,andnoresponsibilityorliabilityisorwillbeacceptedbyBSIinrelationtotheadequacy,accuracy,completenessorreasonablenessofthispublication.Allandanysuchresponsibilityandliabilityisexpresslydisclaimedtothefullextentpermittedbythelaw.Thispublicationisprovidedasis,andistobeusedattherecipientsownrisk.Ther
4、ecipientisadvisedtoconsiderseekingprofessionalguidancewithrespecttoitsuseofthispublication.Thispublicationisnotintendedtoconstituteacontract.Usersareresponsibleforitscorrectapplication.ThispublicationisnottoberegardedasaBritishStandard.TheBritishStandardsInstitution2025PublishedbyBSIStandardsLimited
5、2025ISBN9780539366983ICS37.040.20CompliancewithaPublishedDocumentcannotconferimmunityfromlegalobligations.ThisPublishedDocumentwaspublishedundertheauthorityoftheStandardsPolicyandStrategyCommitteeon31May2025.Amendments/corrigendaissuedsincepublicationDateTextaffectedPDISO/PAS18940-1:2025PubliclyAvai
6、lableSpecificationISO/PAS18940-1Secondedition2025-05ImagingmaterialsImagepermanencespecificationofreflectionphotographicprintsforindoorapplications一Part1:TestmethodsMateriauxpourimageSpecificationrelativealapermanencedeimagedestiragesphotographiquesparreflexionpourapplicationsinterieuresPartie1:Meth
7、odesdessaiReferencenumberISO/PAS18940-l:2025(en)COPYRIGHTPROTECTEDDOCUMENTISO2025Allrightsreserved.Unlessotherwisespecified,orrequiredinthecontextofitsimplementation,nopartofthispublicationmaybereproducedorutilizedotherwiseinanyformorbyanymeans,electronicormechanical,includingphotocopying,orpostingo
8、ntheinternetoranintranet,withoutpriorwrittenpermission.PermissioncanberequestedfromeitherISOattheaddressbeloworISO,smemberbodyinthecountryoftherequester.ISOcopyrightofficeCP401Ch.deBlandonnet8CH-1214Vernier,GenevaPhone:+41227490111Email:copyrightiso.orgWebsite:www.iso.orgPublishedinSwitzerlandPageCo
9、ntentsForewordIntroductionv1 Scope12 Normativereferences13 Terms,definitionsandabbreviations23.1 Termsanddefinitions23.2 Abbreviations24 Requirements25 Testprocedures25.1 Outline25.2 Testtarget25.3 Lightstabilitytest45.4 Ozonegasstabilitytest45.5 Thermalstabilitytest45.6 Humidityfastnesstestinhighhu
10、miditycondition46 Measurement47 Dataprocessingandgraphcreation57.1 Dataprocessing57.2 Calculationofcolourdifference57.3 Graphreporting67.3.1 General67.3.2 Lightstability77.3.3 Ozonegasstability87.3.4 Thermalstability97.3.5 Humidityfastnessinhighhumidityconditions108 Reporting118.1 Internalrecording1
11、18.2 Reportingforexternalcommunications12Bibliography14ForewordISO(theInternationalOrganizationforStandardization)isaworldwidefederationofnationalstandardsbodies(ISOmemberbodies).TheworkofpreparingInternationalStandardsisnormallycarriedoutthroughISOtechnicalcommittees.Eachmemberbodyinterestedinasubj
12、ectforwhichatechnicalcommitteehasbeenestablishedhastherighttoberepresentedonthatcommittee.Internationalorganizations,governmentalandnon-governmentabinliaisonwithISO,alsotakepartinthework.ISOcollaboratescloselywiththeInternationalElectrotechnicalCommission(IEC)onallmattersofelectrotechnicalstandardiz
13、ation.TheproceduresusedtodevelopthisdocumentandthoseintendedforitsfurthermaintenancearedescribedintheISO/IECDirectives,Part1.Inparticular,thedifferentapprovalcriterianeededforthedifferenttypesofISOdocumentshouldbenoted.ThisdocumentwasdraftedinaccordancewiththeeditorialrulesoftheISO/IECDirectives,Par
14、t2(seewww.iso.org/directives).ISOdrawsattentiontothepossibilitythattheimplementationofthisdocumentmayinvolvetheuseof（八）patent(三).ISOtakesnopositionconcerningtheevidence,validityorapplicabilityofanyclaimedpatentrightsinrespectthereof.Asofthedateofpublicationofthisdocument,ISOhadnotreceivednoticeof（八）
15、patent(三)whichmayberequiredtoimplementthisdocument.However,implementersarecautionedthatthismaynotrepresentthelatestinformation,whichmaybeobtainedfromthepatentdatabaseavailableatwww.iso.org/patents.ISOshallnotbeheldresponsibleforidentifyinganyorallsuchpatentrights.Anytradenameusedinthisdocumentisinformationgivenfortheconvenienceofusersanddoesnotconstituteanendorsement.Foranexplanationofthevoluntarynatureofstandards,themeaningofISOspecifictermsandexpressionsrelatedtoconformityassessment,aswellasinformationaboutISOsadherencetotheWorldTradeOrganization(WTo)principlesintheTechnical
